Blue whale (Balaenoptera musculus) tail fluke exposed on dive. The blue whale (Balaenoptera musculus) is a marine mammal belonging to the suborder of baleen whales (called Mysticeti). At 30 metres (98 ft) in length and 170 tonnes (190 short tons) or more in weight, it is the largest known animal to have ever existed.
Image provided by Getty Images.
January 10th, 2019
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